复杂非水密结构目标强度预报方法研究

赵欣阳1,梅志远1,祝熠1,杜度2

振动与冲击 ›› 2023, Vol. 42 ›› Issue (5) : 205-214.

PDF(4853 KB)
PDF(4853 KB)
振动与冲击 ›› 2023, Vol. 42 ›› Issue (5) : 205-214.
论文

复杂非水密结构目标强度预报方法研究

  • 赵欣阳1,梅志远1,祝熠1,杜度2
作者信息 +

Target strength prediction method for complex non-watertight structure

  • ZHAO Xinyang1, MEI Zhiyuan1, ZHU Yi1, DU Du2
Author information +
文章历史 +

摘要

为准确预报表面敷设声学覆盖层,内部含耐压圆柱体的非水密结构声目标强度,本文构建了一种新的参数反演方法。将遗传算法与非线性规划相结合,在考虑斜入射、多次散射、吻合效应以及横波波速阈值的情况下,利用分层介质理论建立了双层弹性介质层反演模型,以此替代含复杂内部结构的声学覆盖层,该反演模型与原结构在各个角度下均具有基本相同的反射系数与透射系数。进而,应用COMSOL Multiphysics软件建立表面敷设声学覆盖层,内部含耐压圆柱体的复杂非水密结构与外壳由两种反演材料组成的等效结构,并求其声散射特性。研究表明,收发合置情况下,原结构与等效结构目标强度值基本一致,各个方向入射时研究频段整体误差在1.5dB以下;30°收发分置情况下,原结构与等效结构目标强度波峰波谷趋势相同,各个方向入射时研究频段整体误差在2dB以下。中高频段,原结构与等效结构目标强度指向性吻合程度较好;中低频段,原结构与等效结构目标强度指向性基本一致,但幅值存在差异;总体来看,-30°~30°范围内,除个别频率外,原结构与等效结构目标强度基本吻合。

Abstract

In order to accurately predict the target strength of non-watertight structure with acoustic coating on the surface and pressure cylinder inside, a new parameter inversion method is constructed in this paper. Combining genetic algorithm with nonlinear programming, a double-layer elastic media layer inversion model is established using the layered media theory to replace the acoustic coating layer containing complex internal structure,taking into account the oblique incidence, multiple scattering,anastomosis effect and transverse wave velocity threshold.The inversion model and the original structure have basically the same reflection coefficient and transmission coefficient at all angles. Furthermore, A complex non-watertight structure with an acoustic overlay laid on the surface and a pressure-resistant cylinder inside is constructed by COMSOL Multiphysics , and the shell is an equivalent structure composed of two inverted materials, and calculate its acoustic scattering characteristics. The results show that in the case of monostatic,the target strength values of the original structure and the equivalent structure are basically the same, and the overall error of the research frequency band when incident in each direction is less than 1.5dB; In the case of 30 ° bistatic, the peak and trough trends of the target strength of the original structure and the equivalent structure at each frequency are the same, and the overall error of the research frequency band when incident in each direction is less than 2dB. In the middle and high frequency band, the target intensity directivity of the original structure and the equivalent structure is better; In the middle and low frequency bands, the target intensity directivity of the original structure and the equivalent structure is basically the same, but there are differences in amplitude; Overall, in the range of -30 ° ~ 30 °, except for a few frequencies, the original structure is basically consistent with the target strength of the equivalent structure.

关键词

声学覆盖层;非水密结构 / 参数反演 / 目标强度

Key words

Acoustic coating;Non-watertight structure / Parameter inversion / Target strength

引用本文

导出引用
赵欣阳1,梅志远1,祝熠1,杜度2. 复杂非水密结构目标强度预报方法研究[J]. 振动与冲击, 2023, 42(5): 205-214
ZHAO Xinyang1, MEI Zhiyuan1, ZHU Yi1, DU Du2. Target strength prediction method for complex non-watertight structure[J]. Journal of Vibration and Shock, 2023, 42(5): 205-214

参考文献

[1]申罗杰夫著.水声学波动问题[M].何祚镛,赵晋英译.北京:国防工业出版社.1983.
[2]何祚镛,赵玉芳编.声学理论基础[M].北京:国防工业出版社.1981.
[3]汤渭霖,范军,马忠成著.现代声学科学与技术丛书 水中目标声散射[M].北京:科学出版社.2018.
[4]商德江,何祚镛.加肋双层圆柱壳振动声辐射数值计算分析[J].声学学报,2001(03):193-201.
SHANG Dejiang, HE Zuoyong. The numerical analysis of sound and vibration from a ring-stiffened cylindricaldouble-shell [J].Acta Acustica, 2001(03):193-201.
[5] Dan G . High-Order Local Non-Reflecting Boundary Conditions: A Review[J]. Wave Motion, 2004, 39(4):319-326.
[6]Waterman,  P. C . New Formulation of Acoustic Scattering[J]. Journal of the Acoustical Society of America, 2005, 45(6):1417-1429.
[7]Miller,  Russel D . A comparison between the boundary element method and the wave superposition approach for the analysis of the scattered fields from rigid bodies and elastic shells[J]. J.acoust.soc.am, 1999, 89(5):2185-2196.
[8] Schneider W C , Burton C J . Determination of the Elastic Constants of Solids by Ultrasonic Methods[J]. Journal of Applied Physics, 1949, 20(1):48-58.
[9]陶猛,范军. 基于模拟退火算法的吸声结构参数反演研究[C]//第十届船舶水下噪声学术讨论会论文集.烟台:中国造船工程学会,2005:190-193.
TAO Meng, FAN Jun. Inversion of sound absorption structure parameters based on simulated annealing algorithm[C]// Proceedings of the 10th Symposium on ship underwater noise.Yantai:The Chinese Society of Naval Architects and Marine Engineers,2005:190-193.
[10]孙铁林, 孙辉. 基于遗传算法和目标回波特性的材料参数反演[J]. 兵工学报, 2013, 34(10):1304-1310.
SUN Tielin, SUN Hui. Parametric inversion of material based on genetic algorithm and target characteristics[J].Acta Armamentarii, 2013, 34(10):1304-1310.
[11]金国梁,尹剑飞,温激鸿.基于等效参数反演的敷设声学覆盖层的水下圆柱壳体声散射研究[J].物理学报,2016,65(01):245-253.
JIN Guoliang, YIN Jianfei,WEN Jihong. Investigation of underwater sound scattering on a cylindrical shell coated with anechoic coatings by the finite element method based on an equivalent parameter inversion[J].Acta Physica Sinica, 2016,65(01):245-253.
[12]周世根. 敷设声学覆盖层结构的均匀化方法及其在声散射问题中的应用[D].武汉:华中科技大学,2019.
ZHOU Shiyin. Homogenization method for laying acoustic coating structure and its application in acoustic scattering.Wuhan: Huazhong University of Science and Technology,2019.
[13]王鹏伟,孙维光,董仕杰.无限大多层层合板隔声量分析[J].噪声与振动控制,2021,41(01):210-213.
WANG Pengwei, SUN Weiguang, DONG Shijie.Analysis of sound insulation of infinite multi-layer laminates[J].Noise and Vibration Control,2021,41(01):210-213.

PDF(4853 KB)

251

Accesses

0

Citation

Detail

段落导航
相关文章

/